There are never enough PCI slots to support all the tuners we want in a home theater PC . Sure if you are satisfied with one or two tuners you're fine, but if you go big with lets say 8, you need to get more than one tuner per PCI slot. The Hauppauge WinTV-HVR-1600 does just that, and now they have added support for QAM, which is great for watching HD cable channels without a set top box or even a CableCARD. Sure you can't watch HBO or any of the other encrypted channels, but there is still plenty of great HD programming out there. As with anything else there is a catch, the QAM support is only available on the retail version of the product, and as we all know; Windows Media Center Edition and Vista Media center, don't support QAM. So you will have to use the bundled software to take advantage of the new feature.